If we have multiple instances of a SQL Server 2012 Standard Edition (which has a 64 GB memory limit) on one server which has 192 GBs of RAM, do both instances only have access to the first 64 GBs of memory, or can they access different portions of memory, so that they can each have their own 64 GB "chunk".
This is in consideration for an Active/Active cluster if both nodes fail over to a single node.